Paul labotjssie



(Model.)

P; LAROUSSIE. Button and Stud.

' No. 229,428. Patented June 29,1880.

N'FEERS. PHOTO-LITNOGRAPHER, WASHINGTON. D C.

UNITED STAT-Es PATENT OFFICE.

PAUL LAROUSSIE, OF NEW YORK, N. Y., ASSIGNOR TO HOWARD & SGHERRIEBLE, OF PROVIDENCE, R. I.

BUTTON AND STUD.

SPECIFICATION forming part of Letters Patent No. 229,428, dated June 29, 1880.

Application filed April 24, 1880.

To all 'whom it may concern Be it known that I, PAUL LAnoUssIE, of the city, county, and State of New York, have invented a new and useful Improvement in Buttons and Studs, of'which the following is a specification, reference being had to the accompanying drawings.

This invention relates to that class of buttons and studs embracing sleeve-buttons, collar-buttons, bosom-studs, &c., which have the back constructed with a slot extending inward from the outer edge, and having one edge of said slot bent or turned upward above the other edge to permit of the insertion of the button or stud into a button-hole by turning it.

Suchbuttons and studs as heretofore constructed are very easily inserted, and when well made keep themselves very securely in place, but it is sometimes difficult to take them out.

The object of this invention is to pro vide for the more easy removal or taking out of such buttons and studs; and to this end my invention consists in the construction upon the central post or shank of the stud or button, which is ofapproximatel y cylindrical form, ofa screwthread or spiral projection uniting with the higher or upperedge of the slotin the back and forming an extension or prolongation of said edge for some distance along the post or shank.

Figure l is a side view ot' a stud or button with my improvement. Fig. 2 is a perspective view ot' the same. Fig. 3 is a back view of the same.

A is the head. B is the central post or shank. l is the back, consisting of a plate of nearly circula-r form externally, but having formed in it a slot a, which extends from its periphery to the central post, and which is here represented as of volute shape, although it might be a straight slot extending directly inward from the edge in a radial direction.

The point c at one edge of the slot is depressed somewhat below the other edge, b, of the slot, as shown in Fig. l, to facilitate the insertion of the back C into a button-hole.

So far as l have thus particularly described the stud or button it is well known, and is only (Model.)

here described to enable the novelty to be more particularly distinguished.

d is the screw-thread or spiral projection, which constitutes the most essential feature of my invention. This commences at the bottom of the central post or shank, B, which is of approximately cylindrical form Where it unites with the edge b of the slot of the back, and it extends some distancesay about half wayup the post or shank, forming an upward or forward continuation or extension thereupon of the edge b of the slot ofthe back. Its upper end should preferably be tapered oft so as to vanish into the post or shank.

The stud or button thus constructed is inserted into the button-hole in the same manner as other buttons or studs ofthe same class, by introducing its point o and turning it in the direction of the arrow shown in Figs.2 and 3; but after the back has passed entirely through the hole the turning should be further continued to carry the whole of the thread d on the shank through the hole, and leave the plain part of the post or shank B above the said thread in the hole. The stud then remains secure until it is desired to remove it, when it is turned in a direction the reverse of that above mentioned. The thread d then easily passes the edges of and enters the hole. and so leads or directs the slot thereinto and facilitates the withdrawal.

What I claim as my invention, and desire to secure by Letters Patent, is-

A stud or button having a central post of approximately cylindrical form and a back provided with a slot extending inward from the edge thereof to the central post, one of the edges of which is turned or bent upward above or higher than the other, and having upon the exterior of said central post a screw-thread, which unites with the upper or higher edge of said slot and forms an upward or forward continuation or extension thereof, substantially 9o as and for the purpose specied.

Witnesses: PAUL LAROUSSIE.

FREDK. HAYNES, E. P. JESSUP. 

